Explosion-motor.



L. L. A. SEGUIN. EXPLOSION MOTOR. APPLICATION FILED JUNE so. 1910.

@itemized Feb. 14,1911.

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LOUIS LAZARE AUGUSTE SEGUIN, OF ARI'S, FRANCE, ASSIGNOR TO SOCIETE QESMOTEURS GNOME, OF. PARIS,FRANCE.

EXPLOSION Moron' l'Specification of Letters Patent.

Application filed June 30, 1910. Serial No. 569,148.

To all whom it may concern:

Be it known thatV I, LoUis LAZARE AUGUSTE SneUirna citizenof F rance,residing at 49 Rue Latlitte, Paris, in the Republic Aot France, haveinvented new and useful Improvements in Explosion-Motors, *of which thefollowing is a specification.

in explosion motors.

In the improved motor the distribution This invention relates to`improvements l is eifected by the piston and valves are dispensed with.ln the motor, which can naturally comprise any number of cylinders,

4each cylinder isprovided with a middle part or waist of larger bore orinternal diameter than the two endv parts of said cylinder which isprovided with a stepped pis- 'ton formed by a central tubular part whichis guided in the parts of small diameter of the cylinder, and carryingat an intermediate point ot' its lengthan exterior annular crown orVpiston proper, the diameter of which corresponds to the large bore ofthe.

" cylinder and on which the explosions act.

' The central tubular part ot' the piston is divided by a partition intotwo chambers of which one is closed at its extremity and is providedwith guide wings while the otherl 1s open to provide a passage for thefresh gases. The distribution is 'effected by ports provided in thesides of these two chambers,

by an annular channel formed at one of the -extremities of the enlargedmiddle part of the cylinder and by orifices or spaces be-V tween theguide'wings.

A motor of` his lm'proved type his greatl invention, the 'piston isshown occupying four diiierent positions in the cylinder.

f Fig. 5, shows diagrammatically in partial' vertical section theapplication of the invention to a motor with radial cylinders.v

'Each' cylinder of the motor comprises-af lower, 'chamber acommunicating by one of Y l its extremities with the casing lgbywhichthefexplosive mixture is introduced. Above 'the chamber a is a middlepart of larger;

bore c 01 and an upper chamber d of the same bore as' the chamber' a.The middle y. chamber has at thebottoma circumferential.

formed by a central tubular part divided by a partition g into twochambers h and i. The upper chamber it4 is closed at its upper which areorifices j and which have movement in the part al of the cylinder. j

The chamber- 7JA is open at the bottom tc central tubular part of thepiston carries exteriorly above the partition g a crown c whichconstitutes the piston proper 'on which the explosions act and whichdivides the .middle .part of the cylinder into two chambers c' 01. Theupper chamber hof the piston communicates with the chamber c1. of thecylinder by openings m and the part 4ings n.

crank p. Y l.

lg designates a sparking plugk the chamber'c.

Kturning in the direction of the arrow, the piston rises, and compressestlu$m1xture.

the chamber c1 and chamber It, which oo mmunicate by means of theopenings m, "1ne1 increases and avacuum tends to form there. When thepiston reaches -the'top ot its 'stroke (Fig. 2) the 'mixture `in ai 1scomopenings fn. come into communication with. the chamber c1 thecarbureted air introduced from the casing, orinstance through establishthe'4 balance. v At this momentje *spark isproduced at the plugg the.gases compressedin' c ignite and the exploslon actionpi: the motor.,Toward the end of vthis movement the .orifices y are nnmasked 3) andthe burned gases contained inc escpe'by the open lchamber d' of thecylin- -der`while the crown or piston la drives back the fresh gases'present in el through the openings mintothe chamber h. The aggre gatespace c1 h, diminishes, 'these fresh compressed gases arein it. At theend oi' the v raten-tea nen. ifi, ieri. V

I channel f. In this cylinder works ar-,piston allow the fresh gases toenter thereinif'lhis mounted in The action isA as follows: Iii'theposition shown in Fig. l, the annular chamber"c 1s^ full of thecombustible'inixture Thecrank At the same time the aggregatey eapacityofpressed and ready'to be fired and as the.

a bore 1" in the motor shaft is drawn by the. suction in c1 andh intothese chambers te revextremity and carries guide wings between l ofI thepiston 'has below a series of opencreases, owing to the fact that thevolume of 'drives the piston downward to :produce the carbureted gas inl, and in 01, sweep out theburned gases which ,are remaining 1n c (F 1g.

4) and-supersede. them, which terminates the cycle, whichis effecteddurin a single rotatio-n of the crank. lWhen't e piston rises again thecarbureted gas resent in e is compressed, vavacuum is pr uced in c1 andin h z and the same operations are repeated in the' same order as abovedescribed. 'As can be seen the two stroke cycleis obtained withl tightcylinders and a complete expulsioniof burned gases. Further the valvesare `dis.

pensed with and the construction of the motor considerably simplified.

In motors with radial cylinders as diagrammatically represented 1n Fig.5, for an equal size ofmotor, greater power can be obtained than withmotors of the same'kind employed vup to the present, as the enlargementof the middle parts' of the cylinders permits pistons of` largerdiameter to be used' thus obtainingaJ motor'ofvla'rger cylinder bore, byutilizing to the best advantage the space which lies between twoneighboringl cylinders and which'increases in proportion to the distancefrom the center of the motor by reason of the rad-ial disposiltion ofthe cylinders.

Having now described my invention, what to secure by Letparts, an'annular channel formedl at the lowerend of the middle part, a casingwith which the cylinder eommun'icates,'means -for feeding carburetedair/to said p casing, a stepped iston formed by a central tubular 'partguided in the parts of small diameter of the cylinder and carrying at a.point in' termediate of its lengthan exterior crown or piston proper thediameter of which corresponds tothe larger bore of the cylinder, a

partition dividing the central tubular part of.` the piston intotwochambers of which one is closed at vits extremity, guide wings formed'at the upper `end of the central tubular part and having-orifices orspaces between them, vorifices formed at ,thevbottom of theclosedcha-mber of the central tubular part of the iston, andori'cesvformed at the lower end) described and for the purpose settorth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses. l v

LOUIS LAZRE AUGUSTE SEGUIN.

Witnesses:

ANTOINE LAvoIX,

C. Coxn.

l of the piston, substantially as

